j
Perform XMT Crystal Oscillator Frequency Checks and Adjustment
procedure. Refer to Para. 5.18.
k
On power supply, set PA ON/OFF switch to ON (if turned off in Step a).
Output level calibration is required for the last amplification stage in
the chain of XMT amplifiers leading to the antenna, only. If the radio is
equipped with a PA and a transmitter fails, the replacement transmit-
ter must be adjusted to return the radio to the original PA output
power. It is not necessary to calibrate the transmitter.
l
Is radio equipped with optional PA?
If no, Perform XMTR Output Level Calibration (No PA) procedure. Refer to
Para. 5.21.
If yes, restore PA output level. See applicable Figure 5-17 or Figure 5-18 for pro-
cedure.
m
Perform one of the following XMTR Carrier Null Adjustment procedures:
n
STOP. This procedure is complete.
Note
In-Service XMTR Carrier Null Adjustment Using spectrum
Analyzer, Para. 5.20
XMTR Carrier Null Adjustment Using Spectrum Analyzer,
(Refer to CD).
XMTR Carrier Null Adjustment Using DVM, (Refer to CD).
5-41